Jules barlet



J. BARLET. STEAM BOILER.

(No Model.)

No. 462,613. Patented N0v.3, 1891.

' obtained Letters UNITED STATES PATENT OFFICE.

JULES BARLET, OF VITRY-EN-ARTOIS, FRANCE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 462,613, dated November3, 1891.

Application filed January 2, 1891. Serial No. 376,443. (No model.)Patented in France June 21, 1890, N0. 206M414.

To all whom it may concern.-

Be it known that I, JULEs BARLET, a citizen of the French Republic,residing at Vitry-en- Artois, Pas de Calais, France, have inventedcertain new and useful Improvements in or Relating to SteamBoilers, (forwhich I have Patent in France, No. 206,414, dated June 21,1890,) ofwhich the following is a specification.

This invention relates to steam-boilers in which steam is generatedpartly by means of boiler-tubes or supplemental shells or boilers.

The invention consists in the construction, arrangement, and combinationof parts, as hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims.

Figure l is a vertical transverse section, and Fig. 2 a verticallongitudinal section, of my bailer on line a b c d efof Fig. 2.

The main body A of the improved boiler is connected with the boilertubesby four branch tubes D. The upper portion of the body is surmounted by adome J, at the top of which there is a man-hole.

The cylindrical body is supported by preferably siX side wings orbrackets U, resting upon the masonry. The fire-grate E is arrangedwithin the main body in atube or flue B. It will be seen that the grateby simply resting within the tube 13 is adapted for ready removalthrough one end of the said tube. Above the grate there is a fusibleplug V, the stopper or plug being preferably made of brass and recessed,the recess being filled with tin-solder. Under normal circumstances thisplug is covered with water; but when the water-level sinks sufiicientlyto expose the plug to the action of the fire the solder melts, and thusadmits steam, which, by rushing onto the flame, extinguishes it. Tosettle the boiler in operation again all that is necessary is to refillthe recess of the plug with solder and admit a fresh supply of water tothe boiler. The tube B, by resting at its ends within the cylindricalflange B of the end plates or headers of the boiler, renders said tubecapable of removal from within the boiler. The

lower boilers rest upon cast supports I and are internally provided withtubes G and closed by stayed tube-plates at either end. In the lowerportion is provided a free space for cleaning purposes, as well as aman-hole. The entrance is at 0, where an opening is provided, whichunder normal circumstances is closed by a safety-valve, such as is usedin digesters. The tubes are expanded and protected against the action ofthe fire by a counter plate. The blow-off pipes I-I, arranged at thefront part of the masonry and at the lower portions of the boilers,enable the discharge to be effected without pressure. In front andbehind the boiler-tubes are smoke-boxes F and G, which facilitate thecirculation of the gases and afford access to the tubes and back part ofthe fire-box.

The operation is as follows: The gases arising from combustion passthrough the first smoke-box F and the boiler-tubes and enter the secondsmoke-box G at the opposite end. They then rise between the boilers andthe main body, and, owing to the arrangement of the deflecting walls orbridges R Q R, heat the upper portion of the boilers and the top of themain body M, whereupon they issue through the openings provided behindthe said deflecting-walls and redescend to the space below the boilers,after heating the lower portion N of which they escape through the flueor chimney.

The feed-water is admitted into the upper part of the boiler through theopening X, and thence descends along the walls of the firebox or fine bya bifurcated tube V and is discharged by the latter into the uprighttubes at the front. The object of this arrangement is to heat the waterby contact with the walls of the fire box and to cause the impurities tobe deposited in the vicinity of the discharge-cocks H, so that they canbe readily carried away.

As the fire-box is only covered by a thin layer of water, the steamsubmitted to the practically direct action of the fire becomessuperheated and gets rid of most of the water it contains. Steam isderived from the dome J through the pipes P, connected together atsufficient height above the dome not to interfere with the easy accessto the man-hole.

I claim 1. In a steam-boiler, the combination, with the main boiler A,provided with the internally-arranged fire-tube B,having a grate, 0f thesupplemental boilers arranged below the main boiler and in suchpositions relatively thereto as to leave a space between and around allsaid boilers, the shorttubes D, connecting the water-space of the mainboiler with the like spaces of the supplemental boilers, firetubesarranged within the latter boilers,

smoke-boxes at each end of the latter and serving as a means ofcommunication between the fire-tubes thereof and the fire-tube of themain boiler, and the feed-water pipe W, bifurcated and passing aroundthe firetube of the main boiler and discharging into the water-space ofthe supplemental boilers, all said parts being arranged and combined forco-operation substantially as described.

2. In a steam-boiler, the combination, with the main boiler A, providedwith the internally-arranged fire-tube B, the latter being adapted forremoval through one end of the said boiler and provided with a grate, ofthe supplemental boilers arranged below the main boiler and in suchpositions relatively thereto as to leave a space between and around allsaid boilers, the short tubes D, connecting the water-space of the mainboiler with the like spaces of the supplemental boilers, fire-tubesarranged within thelatter boilers, smoke- 1 boxes at each end of thelatter and serving ter-space of the supplemental boilers, all arrangedand combined for cooperation substantially as described.

3. In a'stearn-boiler, the combination, with the main boiler A, providedwith the internally-arranged fire-tube B, having a grate, of thesupplemental boilers arranged below the main boiler and in suchpositions relatively thereto as to leavea space between and around allsaid boilers, the short tubes D, connecting the Waterspaces of the mainand supplemental boilers, fire-tubes arranged within the latter boilers,smoke-boxes at each end of the latter and serving as a means ofcommunication between the fire-tubes thereof and the fire-tube of themain boiler, the feed-Water pipe W, bifurcated and passing around thefire-tube of the main boiler and discharging into the Water-space of thesupplemental boilers, and the blow-off pipes H, connecting thewater-spaces of the supplemental boilers JULES BARLET.

Vitnesses:

ANTOINE GENTZ, EUGENE Louis JOSSERAND.

